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Microstructural and Microchemical Characterisation of CuInSe2 Ingots Grown by the Vertical Bridgman Technique

Published online by Cambridge University Press:  03 September 2012

C. A. Mullan ,
S. M. Casey ,
C. Jones ,
C. J. Kiely ,
M. Imanieh  and
R. D. Tomlinson
C. A. Mullan
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool, England.
S. M. Casey
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool, England.
C. Jones
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool, England.
C. J. Kiely
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool, England.
M. Imanieh
Affiliation:
Department of Electronic and Electrical Engineering, The University of Salford, England.
R. D. Tomlinson
Affiliation:
Department of Electronic and Electrical Engineering, The University of Salford, England.
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Abstract

The microstructure and microchemistry of a number of melt textured CuInSe2 ingots prepared from a variety of starting charge compositions have been investigated using a combination of TEM, EPMA and Auger spectroscopy. If a stoichiometric starting mixture is used, In-rich and Cu-rich precipitates are found at the first and last to freeze zones of the ingot respectively, accompanied by an intervening mid-portion of inclusion free (although slightly off-stoichiometry) CuInSe2 We have found that in order to achieve an optimum matrix composition, a Cu-rich charge is required; however, this leads to a fine distribution of copper selenide particles throughout the ingot. If the starting charge is In-rich, then the boule contains In-rich precipitates and the matrix composition is In-rich and Cu-deficient. These observations are correlated with the observed electrical characteristics of the boules.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 262: Symposium E – Defect Engineering in Semiconductor Growth, Processing and Device Technology , 1992 , 117
Copyright
Copyright © Materials Research Society 1992

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References

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